Method and apparatus for applying asymmetric biphasic truncated exponential countershocks
US5083562A · kind A · utility
146Cited by
11References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 28, 1990 |
| Grant date | Jan 28, 1992 |
| Priority date | — |
| Expiry date | Aug 28, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3912
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for applying an asymmetric biphasic exponential waveform countershock to the heart useful in an implantable cardioverter or defibrillator, wherein the second phase has a start amplitude of substantially one half that of the first phase, and wherein the polarity of a capacitor discharging through a current path including the heart is reversed. A voltage reversing circuit may include a voltage shifter which shifts voltage associated with switching elements in the circuit to reduce voltage stresses in the switching elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.